Internal-combustion engine



April 6,1926. 1,519,266

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April 6 Q 1926. 1,579,266

' G. s. wlLKlNsoN Er AL INTERNAL CIBUSTIO BIGIIB rma mw. 12. 1924 s sheets-sheets Patented Apr. 6, 1926.

UNTED f-STTES kPATENT OFFICE.

' GEORGE SHAKESPEARE WILKINSON, OF LONDON, ENGLAND, AND MONTAGUE STAN- LEY NAPIER, OIEr CANNES, FRANCE, ASSIG-NORSTO D. NAPIER & SON LIMITED, 0F LONDON, ENGLAND, A BRITISH COMPANY.

INTERNAL-COMBUSTION ENGINE.

Application led November 12, 1924. Serial No. 749,483.

y To all wiz-0m t may concern:

Bev it known that we, GEORGE-SHAKE- SPEARE VVrLKiNsoN and MoN'rAGUn STANLEY cam shafts, each camshaft being drivenl by a radially disposed shaft. It is thek object of the present inventionv to provide an arrangement of thisI general type in which the mechanism for driving the pumps 'for circulating oil and water and all such auxiliary appliances is improved and simplied and a compact general arrangement provided capable of being enclosed within a single casing. l

To this end, according to this invention an oil circulating pump of the gear wheel type is driven directly from a radially disposed cam shaft driving shaft and the driven shaft of this pump in turn drives a water circulating pump and if desired also a rotary gas distributing valve for` starting purposes. The gear wheel pump is preferably of the two stage type and in this case the water circulating pumpvmay be driven from either one ,of the driven pump elements.

The arrangement is particularly, though not exclusively, 'applicable for internal combustion engines in which the cylinders radiate downwards from the crank shaft and the driving pinion for the pumps and like auxiliary devices is conveniently mount' ed upon the central radial shaft sc that the pumps and other auxiliary apparatus driven therefrom are disposed approximately in the centre line of the engine and below the crank shaft. v

A construction embodying the present invention is illustrated by way of example in the accompanying drawings in which,

Figure l is an end elevation of the engine partly in section,

Figure 2 is a central vertical sectional side elevation showing the cam shaft driving gear and its casing, f i Figure 8 is a central vertical Sectio through the oil circulating pump on an enlarged scale, and

Figure 4 is a sectional elevation also on an enlarged scale showing the connection between the driven shaft of the oil circulating pump and the water circulating pump.

In the construction illustrated the engine is provided with a crank sh aft Afrom which radiate three groups of cylinders B C D, the crank shaft being disposed above the cylinders. vThe crank shaft A carries at its end a bevelv pinion A which meshes with bevel pinions B D respectively carried by radial shafts B2 D2 which drive the cam shafts of their respective cylinder groups B and D in the known manner. The pinion AD carries a second pinion D3V which ymeshes with a bevel pinion C on the shaft C2, the pinions B C and D thus overlapping in the usual way.

Formed upon the shaft C2 towards its lower end is a pinion E which constitutes the driving pinion of a. low pressure or scavenging oil circulating pump. This pumpvis formed within a casing Fbuilt into or forming part of the casing or cover which encloses the cam shaft driving mechanism generally. The pinion E not only acts as a driving member for the low pressure oil circula-ting pump, but further constitutes one of the elementsof this pump which is of the known gear wheel type comprising three intermeshing gear wheels, E, E, E2, and drives a high pressure pump or sta e comprising intermeshing gear wheels G disposed above and upon the sameshafts as the pinions E E2 respectively.

At its lower end the shaft H, upon which the pinions G E2 are mounted carries a bevel pinion H which meshes with a similar pinion J on the shaft J of a centrifugal water circulating pump J2 of known construction.

Keyed to or formed integral with the high pressure pump pinion G, and above this pinion, is a driving pinion K meshing with a pinion K on the shaft of a rotary valve used for starting purposes, by means of which air or gas under pressure is distributed to the various cylinders. The starting air or gas is distributed through ports K2 radiating lll from the easing of the valve, the pipes connecting the valves to the various cylinders being omitted from Figure 2 for the salie of clearness as the valve itself and these connections are of known construction.

It will thus be seen that a single pinion on the cam shaft driving shaft of the central group of cylinders serves to impart the necessary drive to the oil circulating pumps, to the Water circulating pump and to the rotary starting valve and that all this auxiliary apparatus is enclosed in a suitable casing which can be readily detached from or with the asing enclosing the cani shaft driving inechanisni of the central cylinder group.

It will be appreciated that the particular manner in which the central radial shaft is driven is in'nnaterial and that the constructional details may be varied without departing from this invention.

Whatwe claim as our invention and desire to secure by Letters Patent is l. A multicylinder internal combustion engine having cylinders or groups of cylinders radiating from the crank shaft including in combination at least one cam shaft adjacent to each cylinder head, at least one radially disposed cam shaft driving shaft, a gear pump for circulating oil comprising a driving gear wheel carried by a radial cain shaft driving shaft and a driven gear wheel meshing therewith, a water circulating pump and means for driving the water circulating pump from the driven gear wheel of the oil circulating pump.

Q. A multicylinder internal combustion engine having cylinders or groups of cylinders radiating from the crank shaft including in combination at least one cam shaft ad jacent to each cylinder head, at least one radially disposed cam shaft driving shaft, a gear pump for circulating oil comprising a low pressure stage the driving gear wheel of which is mounted on a radially disposed cam shaft driving` shaft and a high pressure stage driven from one of the driven gear wheels of the low pressure stage, a water eireulating pump and means for driving the water circulating pump from one of the driven gear Wheels of the oil circulating pump.

3. A multicylinder internal combustion engine having cylinders or groups of cylinders radiating from the crankshaft including in combination at least one cam shaft adjacent to each cylinder head, at least one radially disposed cam shaft driving shalt, a gear pump for circulating oil comprising a driving gear wheel carried by a radial earn shaft driving shaft and a driven gear wheel meshing therewith, a water circulating pump, a rotary gas distributing valve for starting purposes and ineaus lor driving the water circulating pinnp and the distributing valve from the driven gear wheel ol' the oil circulating pump.

-l-. niulticylinder internal eoniliusl ion engine having groups of cylinders radiating from the crank shaft including in eonihination an overhead cam sha t't Vtor each group of cylinders, a radially disposed cani Isliait driving shaft for each cain sha tt, a gear puinp l'or circulating oil comprising a driving gear wheel carried by one of the radial cain shaft driving shafts and a driven gear wheel nieshing therewith, a water circulating pump, a rotary gas distributing valve l'or .starting purposes and means for driving the water circulating pump and the distributing valve from the driven gear wheel of the oil eireulating pump.

A multicylinder internal coinhuslion engine having groups of cylinders radiating from the crank shaft includingr in eonihination an overhead cam shalt for each group of cylinders, a radially disposed driving shaft for each cani shaft, a gear pump for circulating oil comprising a low pressure stage the driving gear wheel ol which is carried by one of the radial cani slial't driving shafts and a high pressure stage driven troni one of the driven gear wheels ol' they low pressure stage, a water circulatingpuiup, a rotary gas distributing valve and iueans l'or driving the water circulating punip and rotary distributing valve from one of Lhc driven gear wheels of the oil circulatingy pump.

ln testimony whereof we have signed our names to this specilication.

GERGE SHAKESPEARE WILKINSON. MONTAGUE STANLEY NAPER. 

